/Engine/Source/Runtime/Engine/Classes/Kismet/KismetSystemLibrary.h
Get the clamped state of r.DetailMode, see console variable help (allows for scalability, cannot be used in construction scripts) 0: low, show only object with DetailMode low or higher 1: medium, show all object with DetailMode medium or higher 2: high, show all objects
static int32 GetRenderingDetailMode()